redhat man page for btowc

BTOWC(3)						     Linux Programmer's Manual							  BTOWC(3)

NAME
       btowc - convert single byte to wide character

SYNOPSIS
       #include <wchar.h>

       wint_t btowc(int c);

DESCRIPTION
       The  btowc  function  converts c, interpreted as a multibyte sequence of length 1, starting in the initial shift state, to a wide character
       and returns it. If c is EOF or not a valid multibyte sequence of length 1, the btowc function returns WEOF.

RETURN VALUE
       The btowc function returns the wide character converted from the single byte c. If c is EOF or not a valid multibyte sequence of length	1,
       it returns WEOF.

CONFORMING TO
       ISO/ANSI C, UNIX98

SEE ALSO
       mbtowc(3)

NOTES
       The behaviour of btowc depends on the LC_CTYPE category of the current locale.

       This function should never be used. It does not work for encodings which have state, and unnecessarily treats single bytes differently from
       multibyte sequences. Use the function mbtowc instead.

GNU
								    1999-07-25								  BTOWC(3)